I'd sure hate work somewhere that I couldn't view these shots! C&C per req:
1. The image seems soft; not sure if you've missed focus or done this deliberately, but it doesn't really work for me. Don't forget to check for things like the stray hairs over her eye. I'd also look for a more suitable background (unless she's a real gearhead). Technically the image is about 2/3 - 1 stop under-exposed and very mid-tone rich. Try and brighten it a little and boost the contrast.
2. Good exposure here, but again the background really doesn't work. I'd also go with a much large aperture and try and minimize the DoF. Not really sure about this composition; your point of aim seems to low.
3. Artisically, the best of the three IMO, however again, it seems soft and both underexposed and lacking in contrast. Suggestions as per #1.
Just my $00.02 worth - your mileage may vary.
~John